Projection-lantern.



J. T. ROFFY.

PROJECTION LANTERN.

APPLICATION FILED JAN-6.1913.

Patented. Nov. 9, 1915.

IN VE N TOR.

ORNEY IN FACT This, as well as other objects which will *a eras ATE@FFXQE.

JOSEPH '1. ROFFY, OF NEW YORK, N. Y., ASSIGNOR TO A K-RAY CORPORATION, ACORPORATION OF NEW YORK.

PROJECTION-LANTERN.

Specification of Letters Patent.

Patented Nov. 9, 1915.

Application filed. January 6, 1913. Serial No. 740,375.

7 To all whom it may concern made a new and useful Invention inProjection-Lanterns, of which the following is a specification.

This invention relates to improvements in lighting apparatus and moreparticularly to headlights and searchlights.

An object of this invention has been to provide a headlight orSearchlight having two independent beams of light, one of which isachromatic and therefore when properly directed, devoid of glare, andthe other of which is of the parallel character.

readily appeag to those skilled in this art, I attain in the evicedescribed in the specification and illustrated in the single sheet ofdrawings accompanying the same.

surfaces toward the light source.

.cipal focus coinciding with the The single figure in the drawings isadiagrammatic view of a device embodying this invention.

As the housing for the device may be of any desired form or characterand does not constitute a portion of this invention, no housing has beenshown; merely theelements entering into the makeup of the. inventionhave been shown arranged in proper relation. 2

The device consists of a parabolic reflector 2 and a spherical reflector3 so related oneto the other that their principal foci coincide. vInthis common focus the filament 4 of a lamp 5 is placed. The filament issurrounded by amushroom-shaped globe 6.

Two condensing lenses 7 and 8, which together form a condensing set, aresupported along the line of the principal axis of the reflectors andarranged with their plane Between this lens-set and the light source aring reflector 9 is placed. This ring reflector is a section of a sphereand is polished on its concave surface and arranged with itsprinprincipal focus of spherical reflector 3. r

A projection lens 10 of the convex variety is supported along the lineof the common axis of the reflectors and condensing lens-set at adistance from the condensing lensset which is slightly less than thefocus of the projection lens 10.

The ring reflector 9 performs a double function; it limits the apertureof the condensing lens-set and recovers deflected light.

It will be seen that with this device'two independent beams of lightwill be pro jected in 'a determined and useful direction; one beam whichI designate achromatic will be derived from the condensing set, and oneof the parallel character will be derived from the parabola, and bothwill be proiected through lens 10 in the same direction.

Having thus described my invention, what I claim is:

1. In a head light, a source of light, a spherical reflector behind thesource of light. a condensing lens in front of the source of light, aparabolic reflector contiguous with the spherical reflector andextending around the lens, a ring shaped spherical reflector between thesource and the condensing lens having its concave face next said sourceand a projecting lens in front of said condensing lens and receivingreflected and transmitted light from said source.

2. In a head light, in combination with a source of light, a sphericalreflector behind said source of light, a condensing lens in front ofsaid source of light, the condensing lens and source of light being inclose proximity, a parabolic reflector surrounding said source of lightand a ring shaped inverted reflector between the source of light and thecondensing lens, said ring shaped reflector being substantiallyco-extensive in diameter with the spherical reflector.

In testimony whereof, I have hereunto subscribed my name this 2nd day ofJanuary, 1913. p

JOSEPH T. ROFFY. Witnesses:

ADA ROMING, ANNA CLOHERTY.

